Lever Rule: Summary
Key points from this module:
- The lever rule is a way to represent a mass balance for two phases in equilibrium.
- The lever rule applies to any two phases in equilibrium for a binary system: liquid-liquid, solid-solid, solid-liquid, and liquid-vapor.
- The lever rule also applies to a single-component system to determine the amounts of vapor and liquid in equilibrium (e.g., on a pressure-volume diagram).
From studying this module, you should now be able to:
- Apply the lever rule to any system that has two phases in equilibrium.
Prepared by John L. Falconer, Department of Chemical and Biological Engineering, University of Colorado Boulder